Random characters or lines are appearing on my display

Random characters or lines appearing on your display could be caused a few different settings.

Owner Info

You may have inadvertently typed some random characters in the Owner info section of your device.

Please follow the instructions below to check or change Owner info:

Touch

Touch Settings

Touch Security

Touch Owner info

Developer Options

If you have previously enabled Developer options, you may have accidentally enabled a User Interface option under the Developer Options. Your device has several developer options that can be used by application developers when testing applications.

Please follow the instructions below to check the developer options that may have been enabled on your device: